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Groundwater helps grow our food. Groundwater is an important component in many industrial processes. Groundwater is a source of recharge for lakes, rivers, and wetlands. Ground water is preferable over surface water for a number of reasons. First of all, ground water is reliable during droughts, while surface water can be quickly depleted. Ground water is, in general, easier and cheaper to treat than surface water, because it tends to be less polluted.
The advantages of withdrawing groundwater include water for drinking and irrigation; availability and locality; low cost, no evaporation losses; and it is renewable.
Disadvantages include aquifer depletion from over pumping, subsidence, pollution, saltwater intrusion, and reduced water flow.
In some parts of the world, groundwater is pumped at a faster rate than natural processes recharge the stored underground water. Groundwater use where pumping exceeds recharge is non-renewable and unsustainable. The upper surface of groundwater is the water table. The definition of groundwater, or ground water, is water located beneath the surface of the earth. The water that your well draws from under the ground is an example of groundwater. Water that occurs below the ground and is brought to the land surface by wells or springs is referred to as groundwater.
Groundwater comprises 97 percent of fresh water not tied up as ice and snow in polar ice sheets, glaciers , and snowfields. This greatly exceeds the amount of water in streams, rivers, and lakes. Begin typing your search term above and press enter to search.
Press ESC to cancel. Skip to content Home Physics Is groundwater safe to drink? Ben Davis August 24, Is groundwater safe to drink? What enhances groundwater level?
But not all groundwater is renewable. In fact, humans are using groundwater faster than it can be replenished in many regions of the world. In some of these areas, most of the groundwater was recharged during ancient eras of dramatically cooler or wetter climates.
Northern Africa, the Arabian Peninsula, Australia, Siberia, and the central United States contain large reserves of fossil groundwater. Fossil water can be a tremendous boon to those in arid or semi-arid climes. But it also poses a real question for water managers: Use it now, or save it for later?
Once non-renewable aquifers have been drawn down to a level at which it is not economic to pump the water, they cease to be a resource because they will not recharge for the foreseeable future.
Drawing down this water can also have a variety of other impacts, such as increasing salinity of the water due to salt water intrusion and land subsidence. Location Introduction Sources Groundwater. Top of Page View Interactive Version.
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